president obama and mitt romney spent the day preparing for their first debate tomorrow night. and republican leaders of the house oversight committee charged that the state department ignored pleas for greater security in benghazi, libya, before the u.s. ambassador was killed there. what can middle, high school and college students learn from watching the upcoming presidential debates? kwame holman introduces some special debate teaching tools. >> holman: working with educators around the country, newshour extra, our site for students and teachers, has put together resources to help young viewers learn about the history and evolution of debates, and feel more connected to the democratic process. find those links on the rundown. and headhunter nick corcodilos answers your job search questions, including how to approach a full career change. all that and more is on our web site, newshour.pbs.org. gwen? >> ifill: and that's the newshour for tonight. on wednesday, we'll be joined by mark shields and david brooks for our debate preview. i'm gwen ifill. >> woodruff: and i'm judy woo